A doing-machine



(No Model.)

E. HALSEY.

ADDING MACHINE.

No. 344,180. PatentedJune 22, 1886.

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N. PETERS, Phowmmnpmr. wmiwm mjc.

UNITED STATES PATENT OEEicE.

EDWARD HALSEY, OF SAN JOS, GALFORNIA.

ADDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 344,180, :lated dune 22, Ti 886,

Application fieii September QB, 1855. Serial Xo. 178,478.

To all whom t may concern.-

Be it known that I, EDWARD H iLs EY, a citizen of the United States, residing in San Jose, in the county of Santa Clara and State of California, have invented certain new and useful Improvements in Adding-Machines, of which thefollowing isa specification, reference being had, by figures and letters, to the accompanying drawings, that form a part thereof.

My invention consists in the combination and arrangement of parts, as hereinafter described, producing an adding-machine for 0peration as set forth.

Figure l ofthe drawings is a top view ofthe machine. Fig. 2 is a cross-section at any point, as .e Fig. 3 shows the end portion of the slide in perspective.

A represents a board or tablet having atop plate, B, fixed to and over its upper face in such manner that a small space is left between the plate and the tablet to admit a metal slide, C. By means of wire pins d d,driven through the top plate firmly into the board beneath at intervals apart crosswise, and in several sets lengthwise of the board, this space is divided into grooves, the number of which will depend on the number of slides used in the construetion. Each slide C, being held and guided by the pins, is easily moved out from under the top plate, and is confined between these guides, so as always to heldits position in line with a slot or long opening,b,in the top plate, through which is exposed a portion ofthe face of the slide beneath.

The machine represented in the drawings has the capacity ot' adding any number of figures together as high as two hundred and fifty in a single coluinu, and i'or convenience in manipulating, as well as for general compact ness in form and size, these numbers are distributed among five slides, cach carrying fifty numbers. On lthe first slide are marked the numbers from one to fifty, inclusive, on the second, from fifty-oneto one hundred,inclusive, and so on through the remaining slides. These numbers are arranged along the face of the slides and at regular spaces apart along one side of the middle from end to end, such num ber being immediately opposite a circular hole, CX, so that the slide also has, in addition tothe i the pencil strikes the head of the slot.

(No model.)

line of figures, a row of holes or perforations, as many in number as there are numbers placed on the slide. This rowof perforations is arranged in line along the left side of the slide from end to end. Each slide therefore contains fifty of such perforations, suitably numbered in regular order. To each slide also the top plate forms a cover and serecn,except for that portion visible through the slotted opening b, and the length of this slot is made equal to the space taken up by nine of the spaced perforations GX, so that nine of the perforations are exposed to sight, the remaining surface of the slide, including all thenum bers as well, being covered at the end of the top plate, B. rI he slides are carried out and turned up to furnish stops C2, by which the slides are kept from being moved back. under the top plate. rIlieseturnedfup ends also forni *ringer-pieces for slides when desired to do so by hand.

At each slotted opening b is marked a scale, E,consisting ofthe nine digits,bcginning with No. l,at the top,and ending with No. ),at the bottom, the intervals between the numbers being made to correspond with those between the perforations. Thus each of the n'inc perforations seen through the slot b is identified by a number on the row of digits along the slide ofthe slot.

lThe operation of these parts as thus constructed and combined will bebest understood by showing the manner of performing an eX- ainple in addition ofasingle column oi' figures,

and as an illustration the following figures may convenience in moving the be taken to iind their sum, viz: 4 (i 5 3 8 5 A 8 9 7 2 5 a S. The slides are moved by inserting the cud of a styie or pencil into the perforations in the slide opposite those numbcis of the row of digits E corresponding to the numbers required to be added one at a time, moving the slide outside each time until Into that one of the perforations exposed through the slot b directly opposite the number 4 and corresponding to the ii rst number in the example place the point ofthe pencil and push out the slide until the pencil is stopped by the head of the slet. Then removing the pcneil-point, place it into the perforation opposite 6 ofthe IOO numbers E,and proceed in like mannerto take each number of the column from the scale E until the last number is reached,when it will be found that the second slide must be brought into service,because the sum produced by adding the 9 to that already obtained will exceed the capacity of the first slide by 4. Where a machine is formed of longer slides, however', a greater number of figures may be carried on each slide. In this case the example requires the second slide,upon which the remaininggures are then worked in the same manner one after the other by placing the pencil-point into the perforations in succession opposite the numbers as taken from the scale E. When the last figure is taken from the scale E, and the slide moved by the pencil, the aggregate will be shown by the highest number that is exposed on the slide at the end ofthe top plate, and in the case ofl an example requiring two or more slides to be used, then the last slide will show the required amount.

In constructing these slides I have made them of strips of thin sheet metal wit-h the perforations GX punched through the strips, and a backing, C", afterward Xed upon the bottom or lower face, to prevent the point ofthe pencil or other instrument from scratching or marking the board beneath. The row of iigures upon the top Aface is printed or suitably marked on a strip of papelgwhich isthen xcd progression from the beginning of the first to I the end of the last one, and the row of numerals from l to 9, inclusive, at each opening to .A

designate the perforations exposed,for opera tion as set forth.

2. In an adding-machine of the character described, the slides C,having the row of perforations,and the column of figures correspondu ing in numbers therewith and numbered con secutively in regularly-increasing order from the beginning of the first to the end ofthe last, substantially as described, for operation with a Xed plate, B, having an opening, b, as set forth. v

In testimony that I claim the foregoing I have hereunto set my hand and seal.

EDWARD HALSEY. [1.. s] Vitnesses:

C. W. M. SMITH,

CHAs. E. KELLY. 

